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Re: proxy memory objects patch
From: |
Marcus Brinkmann |
Subject: |
Re: proxy memory objects patch |
Date: |
Thu, 21 Nov 2002 10:32:33 +0100 |
User-agent: |
Mutt/1.4i |
On Wed, Nov 20, 2002 at 09:12:06PM -0500, Roland McGrath wrote:
> > here is my patch for proxy memory objects
>
> Yowza! Does it actually work?
Yes, it is tested. I wrote two programs: One calling io_map and mapping the
memobjrd for writing, which is basically an exploit. The other creates a
proxy memory object restricted to VM_PROT_READ from the memobjrd object, and
then any attempts to write tot he mapped region (mapped with
VM_PROT_READ|VM_PROT_WRITE) segfaults.
Thanks,
Marcus
--
`Rhubarb is no Egyptian god.' GNU http://www.gnu.org marcus@gnu.org
Marcus Brinkmann The Hurd http://www.gnu.org/software/hurd/
Marcus.Brinkmann@ruhr-uni-bochum.de
http://www.marcus-brinkmann.de/
- proxy memory objects patch, Marcus Brinkmann, 2002/11/20
- Re: proxy memory objects patch, Thomas Bushnell, BSG, 2002/11/20
- Re: proxy memory objects patch, Thomas Bushnell, BSG, 2002/11/20
- Re: proxy memory objects patch, Roland McGrath, 2002/11/20
- Re: proxy memory objects patch,
Marcus Brinkmann <=
- Re: proxy memory objects patch, Roland McGrath, 2002/11/20
- Re: proxy memory objects patch, Marcus Brinkmann, 2002/11/21
- Re: proxy memory objects patch, Marcus Brinkmann, 2002/11/22